World of Warcraft - US
These items are the route to power for any player and can confer two stat bonuses which can be much higher than standard rings. An ideal bracer for a melee class, for example would be a 25/25% attack/defence bracer. Also, unlike normal accessories which cannot have an attack increase on the headset, elemental headsets can also have comparable stats such as 25/25% attack/defence. A geared player for example, would have four elemental accessories resulting in an increase of 100% to attack. However, each race has different elementals, which can vary between the races. It is possible to upgrade elementals, however this is an expensive and risky process.
World of Warcraft - US
40% - 50% increase in Attack or Defense Power, depending on the type of weapon/armour. Usually equal in power or defense to the double next weapon/armour available. For example, you got an Intense weapon/armor which is level 30/31, then the next weapon/armour available is level 33/35, then the power equivalent to it is next to 33/35. Can be randomly crafted by a level 40 or higher pure class Specialist (e.g. Specialist-Engineer-BattleLeader).
World of Warcraft - US Power Leveling
Normal mining ores (red, green, blue, yellow and black) can be processed by the Ore Processing NPC. Refining the ore can sometimes produce another ore or bonus items (recovery items, talics, gems).
There is a special ore that can not be sold to NPCs, this is called "Rare Ore". This kind of ore can only be refined in stages by the Ore Processing NPC, which can then be traded for a box at the Gem Collector NPC. If the box is opened, a random type of mining ore (+1, +2, +3, and sometimes even +4) level ore can be obtained along with other possible items (equipment, talics, etc).